1. Dedicated all-In-one aluminum alloy cooling fan for Raspberry Pi 4B, PWM speed adjustment, better cooling, low noise, space saving
2. This is a thin and lightweight heat sink, equipped with a 3510 ultra-quiet cooling fan, and the fan supports PWM speed regulation, which is perfectly compatible with Raspberry Pi OS. Other systems need to manually write python or C code to drive the fan speed through PWM.
3. NOTE: Supports Raspberry Pi 4B Only, Automatic speed control function only supports Raspberry Pi OS.

Specifications:
1. Supported Pi: Raspberry Pi 4 Model B 1GB/2GB/4GB/8GB version
2. Power supply: DC 5V input (can be powered by Raspberry Pi)
3. Interface: 3-wire PWM speed control fan connector
4. Rated power: 0.3W (5V, 0.6+/-0.02A)
5. Cable length: 80+/-10mm
6. Fan: 5500+/-10%RPM

Package List:
1. PI4-FAN-PWM x1
2. Silicone thermal tape x4 and Screw x2